package top.shiyiri.community.controller;

import com.google.code.kaptcha.Producer;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import top.shiyiri.community.bean.User;
import top.shiyiri.community.service.UserService;
import top.shiyiri.community.util.CommunityConstant;
import top.shiyiri.community.util.CommunityUtil;
import top.shiyiri.community.util.RedisKeyUtil;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author Aunean
 * @date 2022/3/14 13:06
 */
@Controller
public class LoginController implements CommunityConstant {

    private static final Logger LOGGER = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService;

    @Autowired
    private Producer producer;

    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @GetMapping("/register")
    public String getRegisterPage() {
        return "site/register";
    }

    @GetMapping("/login")
    public String getLoginPage() {
        return "site/login";
    }

    @PostMapping("/register")
    public String register(Model model, User user) {
        Map<String, Object> map = userService.register(user);
        if (map == null || map.isEmpty()) {
            model.addAttribute("msg", "注册成功，我们已向您的邮箱发送了一封激活邮箱，请尽快激活！");
            model.addAttribute("target", "/index");
            return "site/operate-result";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "site/register";
        }
    }

    // http://localhost:8080/community/activation/1001/code
    @GetMapping("/activation/{userId}/{code}")
    public String activation(Model model, @PathVariable("userId") int userId,
                             @PathVariable("code") String code) {
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS) {
            model.addAttribute("msg", "激活成功，您的账号已经可以使用了！");
            model.addAttribute("target", "/login");
        } else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg", "无效操作，该账号已激活");
            model.addAttribute("target", "/index");
        } else {
            model.addAttribute("msg", "激活失败，您提供的激活码不正确！");
            model.addAttribute("target", "/index");
        }
        return "site/operate-result";
    }

    @GetMapping("/kaptcha")
    public void kaptcha(HttpServletResponse response/*, HttpSession serssion*/) {
        //生成验证码
        String text = producer.createText();
        BufferedImage image = producer.createImage(text);

        //将验证码存入session
//        serssion.setAttribute("kaptcha", text);

        //验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner", kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //将验证码存入Redis
        String kaptchaKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(kaptchaKey, text, 60, TimeUnit.SECONDS);

        //将图片输出给浏览器
        response.setContentType("image/png");
        try {
            ServletOutputStream os = response.getOutputStream();
            ImageIO.write(image, "png", os);
        } catch (IOException e) {
            LOGGER.error("验证码响应失败：" + e.getMessage());
        }
    }

    @PostMapping("/login")
    public String login(String username, String password, String code, boolean rememberMe,
                        Model model, HttpSession session, HttpServletResponse response,
                        @CookieValue("kaptchaOwner") String kaptchaOwner) {
        //检查验证码
        //String kaptcha = (String) session.getAttribute("kaptcha");
        String kaptcha = null;
        if (StringUtils.isNotBlank(kaptchaOwner)) {
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }
        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)) {
            model.addAttribute("codeMsg", "验证码不正确");
            return "site/login";
        }

        //检查账号，密码
        int expiredSeconds = rememberMe? REMEMBER_EXPIRED_SECONDS: DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")) {
            //登录成功
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            //设置能用的路径
            cookie.setPath(contextPath);
            //设置失效时间
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        } else {
            //登录失败
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "site/login";
        }
    }

    @GetMapping("/logout")
    public String logout(@CookieValue("ticket") String ticket) {
        userService.logout(ticket);
        //重定向默认到 GET 请求的 login
        return "redirect:/login";
    }
}
